Which function of a digital slr camera allows the user to set the internal sensor’s sensitivity to light?

a aperture settings

b shutter-speed settings

c autofocus settings

d iso settings

B shutter-speed settings

Explanation:

    The shutter is nothing more than a curtain inside the camera that opens and closes for light to reach the sensor (or film). The longer you open, the more light will come in, and the brighter the picture will be.

   The time the shutter is open is measured by fractions of a second, seconds, minutes and even hours.

i believe their role is to instruct certain sections on when they are to join and when they are to stop